Bottle-cap.



W. E. B. BAKER.

BOTTLE CAP.

APPLICATION FILED APR. 4. |911.

www3. Patented Ju... 18, w18.

wEBsrEP. E.v BYPtoN BAKER, or YORK, PENNSYLVANIA, Ass'IGNOE 'ro ELENEY w. srOKEs, OE PHILADELPHIA, PENNSYLVANIA.

BOTTLE-CAP.

inesatta;

specification of Letters Patent.

Patented lune ld, 191.

To all whom it may concern:

Be it known that I, WEBSTER E. BYRON BAKER, a citizen of the United States, and a resident of York, in the County of York and State of Pennsylvania, have invented a certain new and useful Bottle-Cap, of which the following is a specification.

'llhe principal Object of the present invention to provide a sanitary or hygienic, attractive, durable and comparatively inexpensive bottle cap, of permanent color, which will show printing, make a tight seal and resist abrasion, whlch softens without Change of color under a sterilizing heat and can be readily molded or crimped, and which quickly cools and firmly sets in molded or crimped form.

rllhe invention will be claimed at the end hereof, but will be first described in connection with its embodiment in one form of bottle Cap selected from among other forms for the purpose of illustration in the accompanying drawings forming part hereof, and in which:

Figure 1, is an elevational view, and

Fig.\2, is a cross-sectional view.

ln the drawings 1 is afairly heavy sheet of paper, for example, a sheet of paper lof such a weight that a ream of four hundred and eighty sheets, twenty-four by thirtysix inches, weighs about sixty pounds. The thickness of this sheet should be about 0.0075

' inch, more or less, so as to produce a very pliable sheet which easily conforms to any moldingprocess. rlFhissheetconstitutesabacking for a sheet 2, of celluloid,'pyralin, cellit, or any cellulose ester'plastic. The thickness of thls sheet of Celluloid 2 should be' about 0015-0020 inch, more or less and it may consist entirely of Celluloid or Celluloid formed around a paper matrix and it may contain suitable pigments. The celluloid or Cellulose ester plastic sheet is applied to the- Contact'with the milk or food in the bottle.

The paper referred to should be prepared in a manner which will render it waterproof, that is, it should be thoroughly sized.

Disks are punched from the describedV compond sheet and the tops consistin of a Celluloid or cellulose vester plastic surface, may be printed in one or more colors, by the usual well known methods for printing on Celluloid.

The described disks are placed in a suitable heating apparatus, regulated and set to a temperature that will bring the temperature of the celluloid or cellulose ester plastic to a point which will render it readily moldable. The heated disk is then quickly transferred to a capping die or tool, the formative element of which crimps the cap into place about the bottle, leaving it there until cool, which requires a few seconds, and then returns, leaving the molded cap rigidly intact and crimped around the lip of the bottle, forming a perfect air-tight seal, which is at the same time sterile by reason of the heat to which it was subjected, for example 110O C.

Wherever l use the words Celluloid or similar plastics, these terms are intended to embrace all cellulose ester plastics.' ln fact, plastics such as pyralin may in some cases, in practice, be more satisfactory than celluloid, but the term Celluloid is under- 'stood to embrace all plastic substances formed by the union of any cellulose Aester or mixture of cellulose esters with substances suitable for rendering the resulting mass plastic.

- llf desirable another sheet 0f paper may be added to the top, making a disk composed of two sheets of paper and an intermediate layer of Celluloid or ester plastic material. Likewise, if desirable, extra sheets of aper and Celluloid or ester plastic materia may be added.

The sheet 2 of Cellulose ester plastic serves as a moldingI agent for the paper, and imparts great rigidity to the crimped or molded cap. At the same time the sheet 2, presents an attractive appearance, is not discolored by subjection to a sterilizing temperature, and is not roughened b Contact with ice, or the like. The paperl 1s pliable enough to be readily crimped or folded and its Contact with milk or food is unobjectionable. The fact that the two sheets may be united autogenously isbeneficial, for it is unnecessary to introduce into the combinav Mlm 'and after the bottle hasvbeen opened the cap can be repeatedly replaced until the contents .has been used.

- In using the term bottle cap, Iintend to include seals and closures for containers in general, Whether made of glass or other maglteri'al.

What i dermis; 1. A non-metallic ,self-supporting Abottle v cap moldable by heat and pressure vinto permanent crimped form and comprising the combination of apliable sheet of paper and an agent moldable -by heat and pressure and which when cool imparts rigidity and permanency of form to the cap and which consists of a sheet or coating of cellulose ester plastic adherent to the paper.

2. A non-metallic self-supporting bottle cap moldable by heat and pressure into permanent crimped form and comprising the combination of a pliable sheet of paper exposed on the inside of thecap, and an agent .exposed on the outside of the cap and mold-- able by heat and ress'ure and which when cool imparts rigidityl and permanency of form to the cap and which consists of a sheet or coating of. cellulose ester plastic adherent to the paper.

WEBSTER E. BYRON BAKER. 

